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                  <a href="#gnome-vfs-2.0-gnome-vfs-module-callback.description" class="shortcut">Description</a>
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<div class="refentry">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gnome-vfs-2.0-gnome-vfs-module-callback.top_of_page"></a>gnome-vfs-module-callback</span></h2>
<p>gnome-vfs-module-callback — functions used by apps if they want to answer to callback invocations by gnome-vfs modules</p>
</td>
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<div class="refsynopsisdiv">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"><span class="returnvalue">void</span>                (<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()">*GnomeVFSModuleCallback</a>)           (<em class="parameter"><code><span class="type">gconstpointer</span> in</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> in_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> out</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> out_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>);
<span class="returnvalue">void</span>                (<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()">*GnomeVFSModuleCallbackResponse</a>)   (<em class="parameter"><code><span class="type">gpointer</span> response_data</code></em>);
<span class="returnvalue">void</span>                (<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()">*GnomeVFSAsyncModuleCallback</a>)      (<em class="parameter"><code><span class="type">gconstpointer</span> in</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> in_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> out</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> out_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()"><span class="type">GnomeVFSModuleCallbackResponse</span></a> response</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> response_data</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()">gnome_vfs_module_callback_set_default</a>
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-push" title="gnome_vfs_module_callback_push ()">gnome_vfs_module_callback_push</a>      (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-pop" title="gnome_vfs_module_callback_pop ()">gnome_vfs_module_callback_pop</a>       (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()">gnome_vfs_async_module_callback_set_default</a>
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()">gnome_vfs_async_module_callback_push</a>
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-pop" title="gnome_vfs_async_module_callback_pop ()">gnome_vfs_async_module_callback_pop</a> (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="gnome-vfs-2.0-gnome-vfs-module-callback.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GnomeVFSModuleCallback"></a><h3>GnomeVFSModuleCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                (*GnomeVFSModuleCallback)           (<em class="parameter"><code><span class="type">gconstpointer</span> in</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> in_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> out</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> out_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>);</pre>
<p>
Modules use a <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> to send data to
client applications and request data from them synchronously.
</p>
<p>
The format of <em class="parameter"><code>in</code></em> and <em class="parameter"><code>out</code></em> is determined by the callback name.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>data passed from module to application.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in_size</code></em> :</span></p></td>
<td>size of <em class="parameter"><code>in</code></em> bytes.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>data passed from application to module.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out_size</code></em> :</span></p></td>
<td>size of <em class="parameter"><code>out</code></em> in bytes.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>user data passed when connecting the callback.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GnomeVFSModuleCallbackResponse"></a><h3>GnomeVFSModuleCallbackResponse ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                (*GnomeVFSModuleCallbackResponse)   (<em class="parameter"><code><span class="type">gpointer</span> response_data</code></em>);</pre>
<p>
This is the type of the response function passed to a
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><code class="function">GnomeVFSAsyncModuleCallback()</code></a>. It should be called when the async
callback has completed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>response_data</code></em> :</span></p></td>
<td>pass the response data argument originally passed to the async callback.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GnomeVFSAsyncModuleCallback"></a><h3>GnomeVFSAsyncModuleCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                (*GnomeVFSAsyncModuleCallback)      (<em class="parameter"><code><span class="type">gconstpointer</span> in</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> in_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> out</code></em>,
                                                         <em class="parameter"><code><span class="type">gsize</span> out_size</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()"><span class="type">GnomeVFSModuleCallbackResponse</span></a> response</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> response_data</code></em>);</pre>
<p>
Modules use a <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> to send data to
client applications and request data from them asynchronously.
</p>
<p>
The application is expected to invoke the <em class="parameter"><code>response</code></em> with <em class="parameter"><code>response_data</code></em>
when it is able to satisfy the request.
</p>
<p>
The format of <em class="parameter"><code>in</code></em> and <em class="parameter"><code>out</code></em> is determined by the callback name.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>in</code></em> :</span></p></td>
<td>data passed from module to application.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>in_size</code></em> :</span></p></td>
<td>size of <em class="parameter"><code>in</code></em> bytes.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out</code></em> :</span></p></td>
<td>data passed from application to module.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>out_size</code></em> :</span></p></td>
<td>size of <em class="parameter"><code>out</code></em> in bytes.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>user data passed when connecting the callback.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>response</code></em> :</span></p></td>
<td>
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallbackResponse" title="GnomeVFSModuleCallbackResponse ()"><span class="type">GnomeVFSModuleCallbackResponse</span></a> that must be invoked when the request is satisfied.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>response_data</code></em> :</span></p></td>
<td>data that must be passed to <em class="parameter"><code>response</code></em> when the request is satisfied.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-set-default"></a><h3>gnome_vfs_module_callback_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_module_callback_set_default
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);</pre>
<p>
Set the default callback for <em class="parameter"><code>callback_name</code></em> to
<em class="parameter"><code>callback</code></em>. <em class="parameter"><code>callback</code></em> will be called with <em class="parameter"><code>callback_data</code></em> on the
same thread as the gnome-vfs operation that invokes it. The default
value is shared for all threads, but setting it is thread-safe.
</p>
<p>
Use this function if you want to set a handler to be used by your
whole application. You can use <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-push" title="gnome_vfs_module_callback_push ()"><code class="function">gnome_vfs_module_callback_push()</code></a> to
set a callback function that will temporarily override the default
on the current thread instead. Or you can also use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()"><code class="function">gnome_vfs_async_module_callback_set_default()</code></a> to set an async
callback function.
</p>
<p>
Note: <em class="parameter"><code>destroy_notify</code></em> may be called on any thread - it is not
guaranteed to be called on the main thread.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>name of the module callback to set.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>function to call when the <em class="parameter"><code>callback</code></em> is invoked.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>data to pass to <em class="parameter"><code>callback</code></em>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy_notify</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback_data</code></em> is to be freed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-push"></a><h3>gnome_vfs_module_callback_push ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_module_callback_push      (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSModuleCallback" title="GnomeVFSModuleCallback ()"><span class="type">GnomeVFSModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);</pre>
<p>
Set <em class="parameter"><code>callback</code></em> as a temprary handler for <em class="parameter"><code>callback_name</code></em>. <em class="parameter"><code>callback</code></em>
will be called with <em class="parameter"><code>callback_data</code></em> on the same thread as the
gnome-vfs operation that invokes it. The temporary handler is set
per-thread.
</p>
<p>
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-pop" title="gnome_vfs_module_callback_pop ()"><code class="function">gnome_vfs_module_callback_pop()</code></a> removes the most recently set
temporary handler. The temporary handlers are treated as a first-in
first-out stack.
</p>
<p>
Use this function to set a temporary callback handler for a single
call or a few calls. You can use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()"><code class="function">gnome_vfs_module_callback_set_default()</code></a> to set a callback function
that will establish a permanent global setting for all threads
instead.
</p>
<p>
Note: <em class="parameter"><code>destroy_notify</code></em> may be called on any thread - it is not
guaranteed to be called on the main thread.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>name of the module callback to set temporarily.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>function to call when the <em class="parameter"><code>callback</code></em> is invoked.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>data to pass to <em class="parameter"><code>callback</code></em>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy_notify</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback_data</code></em> is to be freed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-module-callback-pop"></a><h3>gnome_vfs_module_callback_pop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_module_callback_pop       (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-set-default"></a><h3>gnome_vfs_async_module_callback_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_async_module_callback_set_default
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);</pre>
<p>
Set the default async callback for <em class="parameter"><code>callback_name</code></em> to
<em class="parameter"><code>callback</code></em>. <em class="parameter"><code>callback</code></em> will be called with <em class="parameter"><code>callback_data</code></em>
from a callback on the main thread. It will be passed a response
function which should be called to signal completion of the callback.
The callback function itself may return in the meantime.
</p>
<p>
The default value is shared for all threads, but setting it is
thread-safe.
</p>
<p>
Use this function if you want to globally set a callback handler
for use with async operations.
</p>
<p>
You can use <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()"><code class="function">gnome_vfs_async_module_callback_push()</code></a> to set an async
callback function that will temporarily override the default on the
current thread instead. Or you can also use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-module-callback-set-default" title="gnome_vfs_module_callback_set_default ()"><code class="function">gnome_vfs_module_callback_set_default()</code></a> to set a regular callback
function.
</p>
<p>
Note: <em class="parameter"><code>destroy_notify</code></em> may be called on any thread - it is not
guaranteed to be called on the main thread.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>name of the async module callback to set.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback</code></em> is invoked.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>data to pass to <em class="parameter"><code>callback</code></em>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy_notify</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback_data</code></em> is to be freed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-push"></a><h3>gnome_vfs_async_module_callback_push ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_async_module_callback_push
                                                        (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#GnomeVFSAsyncModuleCallback" title="GnomeVFSAsyncModuleCallback ()"><span class="type">GnomeVFSAsyncModuleCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">gpointer</span> callback_data</code></em>,
                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy_notify</code></em>);</pre>
<p>
Set <em class="parameter"><code>callback</code></em> as a temprary async handler for
<em class="parameter"><code>callback_name</code></em>. <em class="parameter"><code>callback</code></em> will be called with <em class="parameter"><code>callback_data</code></em>
from a callback on the main thread. It will be passed a response
function which should be called to signal completion of the
callback. The callback function itself may return in the meantime.
</p>
<p>
The temporary async handler is set per-thread.
</p>
<p>
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-pop" title="gnome_vfs_async_module_callback_pop ()"><code class="function">gnome_vfs_async_module_callback_pop()</code></a> removes the most recently set
temporary handler. The temporary async handlers are
treated as a first-in first-out stack.
</p>
<p>
Use this function to set a temporary async callback handler for a
single call or a few calls. You can use
<a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-set-default" title="gnome_vfs_async_module_callback_set_default ()"><code class="function">gnome_vfs_async_module_callback_set_default()</code></a> to set an async
callback function that will establish a permanent global setting
for all threads instead.
</p>
<p>
Note: <em class="parameter"><code>destroy_notify</code></em> may be called on any thread - it is not
guaranteed to be called on the main thread.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>name of the module callback to set temporarily.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback</code></em> is invoked.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback_data</code></em> :</span></p></td>
<td>data to pass to <em class="parameter"><code>callback</code></em>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy_notify</code></em> :</span></p></td>
<td>function to call when <em class="parameter"><code>callback_data</code></em> is to be freed.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gnome-vfs-async-module-callback-pop"></a><h3>gnome_vfs_async_module_callback_pop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gnome_vfs_async_module_callback_pop (<em class="parameter"><code>const <span class="type">char</span> *callback_name</code></em>);</pre>
<p>
Remove the temporary async handler for <em class="parameter"><code>callback_name</code></em> most recently
set with <a class="link" href="gnome-vfs-2.0-gnome-vfs-module-callback.html#gnome-vfs-async-module-callback-push" title="gnome_vfs_async_module_callback_push ()"><code class="function">gnome_vfs_async_module_callback_push()</code></a>.  If another
temporary async handler was previously set on the same thread, it
becomes the current handler. Otherwise, the default async handler,
if any, becomes current.
</p>
<p>
The temporary async handlers are treated as a first-in first-out
stack.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>callback_name</code></em> :</span></p></td>
<td>name of the module callback to remove a temporary handler for.
</td>
</tr></tbody>
</table></div>
</div>
</div>
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